Keen Ellwood Backpack
Here's what other sites are saying:
Throw the Keen Ellwood Backpack on your back and head for the woods. The Ellwood is loaded with space for survival gear and weapons, so you should be OK even if the undead hoards find you. Keen's comfortable suspension system is designed to keep you comfortable for hours, even if you're loaded down with weapons and supplies, and distributes weight evenly so you can move quickly from you slow but numerous pursuers.